As we reach the mid-point of the 2011 Atlantic hurricane season, we review the CAT-i reports from Guy Carpenter that reported on the major events.

Update: Hurricane Katia: Katia became the second hurricane of the 2011 Atlantic hurricane season yesterday when it reached category 1 status. Katia has since weakened back to a tropical storm as it encounters less favorable conditions.

Update: Hurricane Irene: Hurricane Irene made three landfalls in the United States over the weekend, becoming the first hurricane to come ashore in the U.S. mainland since Ike in 2008. Irene made its initial landfall near Cape Lookout on the Outer Banks of North Carolina at around 12:00 UTC on August 27 with sustained winds of around 85 mph (140 kmph), equivalent to a category 1 hurricane, according to the National Hurricane Center (NHC).

Update: Tropical Storm Emily: Tropical Storm Emily is currently located in the eastern Caribbean Sea, approximately 90 miles (145 kilometers) south of Port-au-Prince Haiti, according to the National Hurricane Center (NHC). Emily packs sustained winds of around 50 mph (85 kmph). The storm is moving slowly on a west-northwest track after spending the early morning stationary just south of the Hispaniola Island.

Update: Tropical Storm Don: Tropical Storm Don, the fourth named storm of the 2011 Atlantic hurricane season, developed at 21:00 UTC on July 27 and is currently located in the Gulf of Mexico, approximately 190 miles (305 kilometers) southeast of Corpus Christi in Texas, according to the National Hurricane Center (NHC).

Update: Tropical Storm Arlene: Tropical Storm Arlene made landfall near Cabo Rojo in Mexico’s Veracruz State at around 09:00 UTC earlier today with sustained winds of around 65 mph (100 kmph), equivalent to a strong tropical storm, according to the National Hurricane Center (NHC).